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30 * \brief Array list implementation.
31 * \details Also provides several low-level functions for custom array list implementations.
33 * \author Olaf Wintermann
35 * \copyright 2-Clause BSD License
39 #ifndef UCX_ARRAY_LIST_H
40 #define UCX_ARRAY_LIST_H
49 * Defines a reallocation mechanism for arrays.
51 struct cx_array_reallocator_s {
53 * Re-allocates space for the given array.
55 * Implementations are not required to free the original array.
56 * This allows re-allocation of static memory by allocating heap memory
57 * and copying the array contents. The information in \p data can keep
58 * track of the state of the memory or other additional allocator info.
60 * @param array the array to reallocate
61 * @param capacity the new capacity (number of elements)
62 * @param elem_size the size of each element
63 * @param alloc a reference to this allocator
64 * @return a pointer to the reallocated memory or \c NULL on failure
70 struct cx_array_reallocator_s *alloc
74 * Custom data pointer.
78 * Custom data pointer.
82 * Custom data integer.
86 * Custom data integer.
92 * Return codes for cx_array_copy().
94 enum cx_array_copy_result {
95 CX_ARRAY_COPY_SUCCESS,
96 CX_ARRAY_COPY_REALLOC_NOT_SUPPORTED,
97 CX_ARRAY_COPY_REALLOC_FAILED,
101 * Copies elements from one array to another.
103 * The elements are copied to the \p target array at the specified \p index,
104 * overwriting possible elements. The \p index does not need to be in range of
105 * the current array \p size. If the new index plus the number of elements added
106 * would extend the array's size, and \p capacity is not \c NULL, the remaining
109 * If the capacity is insufficient to hold the new data, a reallocation
110 * attempt is made, unless the allocator is set to \c NULL, in which case
111 * this function ultimately returns a failure.
113 * @param target the target array
114 * @param size a pointer to the size of the target array
115 * @param capacity a pointer to the target array's capacity -
116 * \c NULL if only the size shall be used to bound the array
117 * @param index the index where the copied elements shall be placed
118 * @param src the source array
119 * @param elem_size the size of one element
120 * @param elem_count the number of elements to copy
121 * @param reallocator the array re-allocator to use, or \c NULL
122 * if re-allocation shall not happen
123 * @return zero on success, non-zero error code on failure
125 enum cx_array_copy_result cx_array_copy(
133 struct cx_array_reallocator_s *reallocator
134 ) __attribute__((__nonnull__(1, 2, 5)));
138 * Swaps two array elements.
140 * @param arr the array
141 * @param elem_size the element size
142 * @param idx1 index of first element
143 * @param idx2 index of second element
150 ) __attribute__((__nonnull__));
153 * Allocates an array list for storing elements with \p item_size bytes each.
155 * If \p item_size is CX_STORE_POINTERS, the created list will be created as if
156 * cxListStorePointers() was called immediately after creation.
158 * @param allocator the allocator for allocating the list memory
159 * (if \c NULL the cxDefaultAllocator will be used)
160 * @param comparator the comparator for the elements
161 * (if \c NULL sort and find functions will not work)
162 * @param item_size the size of each element in bytes
163 * @param initial_capacity the initial number of elements the array can store
164 * @return the created list
166 CxList *cxArrayListCreate(
167 CxAllocator const *allocator,
168 cx_compare_func comparator,
170 size_t initial_capacity
174 * Allocates an array list for storing elements with \p item_size bytes each.
176 * The list will use the cxDefaultAllocator and \em NO compare function.
177 * If you want to call functions that need a compare function, you have to
178 * set it immediately after creation or use cxArrayListCreate().
180 * If \p item_size is CX_STORE_POINTERS, the created list will be created as if
181 * cxListStorePointers() was called immediately after creation.
183 * @param item_size the size of each element in bytes
184 * @param initial_capacity the initial number of elements the array can store
185 * @return the created list
187 #define cxArrayListCreateSimple(item_size, initial_capacity) \
188 cxArrayListCreate(NULL, NULL, item_size, initial_capacity)
194 #endif // UCX_ARRAY_LIST_H